. "Luo" . "Congwen" . "Congwen Luo"@en . "罗从文."@zh . . . . "2005" . . "9787564005825" . "7564005823" . . "Beijing li gong da xue chu ban she" . . "cc" . "65187772" . "De Morgan 代数"@zh . . . . "2005" . "Di 1 ban." . "65187772" . . . . . . . . "zh" . . . . . "De Morgan dai shu" . . . "De Morgan" . "Augustus" . "Augustus De Morgan" . "1806" . "1871" . . "Beijing Shi" . . "Logic, Symbolic and mathematical" . . "Algebra, Abstract" . . "De Morgan" . "Augustus" . "Augustus De Morgan" . "1806" . "1871" . . . . "2018-03-10" . .